ul>li{
    list-style: none;
}
/* 可展开*/
.switch-open
{
    margin-left:-12px;
    border:6px solid transparent;
    display:inline-block;
    width:0px;
    height:0px;
    border-top-color: black;

}
/* 展开完毕*/
.switch-close
{
    margin-left:-12px;
    border:6px solid transparent;
    display:inline-block;
    width:0px;
    height:0px;
    border-left-color: black;
    margin-bottom: 2px;

}
/* 改变CheckBox样式*/
input[type='checkbox']{
    width: 20px;
    height: 20px;

    -webkit-appearance:none;
    -moz-appearance: none;
    border: 1px solid #c9c9c9;
    border-radius: 3px;
    outline: none;
    color:white;
    text-align: center;
}
input[type='checkbox']:before
{
    content: '√ ';
    color:transparent;
}
input[type=checkbox]:checked{
    background-color: #30add6;
}
input[type=checkbox]:checked:before{
    content: '√';
    color:white;
    font-weight: bold;
}